Bearing plane for aircraft



Sept. 2 1924. 1,506,817

C.'DORNIER BEARING i'uus FOR AIRCRAFT mm m. 23. 1:21

INVENTOR= Patented Sept. 2, 1924.

UNITED STATES PATENT OFFICE.

CLAUDIUS DORNIER, OF FRIEDRICHSHAFEN, GERlViANY, ASSIGNOR, BY MESNE AS-SIGNMENTS, TO DORNIER-METALLBAUTEN GESELLSCHAFT MIT BESCI-IRANKTERHAFTUNG, AND SAID GLAUDIUS IDORNIER, BOTH OF FRIEDRICHSHAFEN, GER- MANY.

BEARING PLANE FOR AIRCRAFT.

Application filed December 23, 1921.

To all whom it may concern:

Be it known that I, CLAUnIUs DORNIER, a German citizen, residing atFriedrichshafen 11/13., Germany, have invented certain new and usefulImprovements in Bearing Planes for Aircraft, of which the following is aspecification.

My invention relates to bearing planes for aircraft and its particularobject is to increase the height of the plane at the rear without anysubstantial deteriorationv of aerodynamic efliciency.

lit was held up till now that in a bearing plane the shape andconfiguration of the rear edge plays an important role with regard tothe air resistance. I have now as certained that the experiences madewith bodies offering a minimum of air resistance cannot be directlyapplied to bearing planes or other surfaces having considerable depth ascompared with their frontal height. More particularly the air resistanceis not increased materially if the rear edge of the bearing planeinstead of being made thin as is the general practice now, forms asurface extending at an angle to the bearing plane.

The greater height of section of the rear portion of the bearing planeas compared 10 with a plane of equal width but with the usual thin rearedge, results in a more favorable design of the rear spar which issubjected to a particularly heavy stress and which can now be madelarger in section.

Serial No. 524,477.

In the drawings aflixed to this specification and forming part thereof,a bearing surface embodying my invention is illustrated in diagrammaticsection by way of example.

Referring to the drawings, 1 is the lower and 2 is the upper surface ofa streamlined bearing plane. 3 is a surface of substantial heightextending substantially at right angles to l and 2 and forming the rearface of the plane. As the drawing shows this hearing plane has the crosssection of a streamlined body with about one fifth of its length cutaway at its rear end. Obviously a far stronger spar can be accommodatedin the rear portion of this plane than in a plane of usual configurationsuch as indicated by the dotted line 4.

I wish it to be understood that I do not desire to be limited to theexact details of construction shown and described, for obviousmodifications will occur to a person skilled in the art.

I claim:

A bearing plane for aircraft having the cross section of a streamlinedbody with about one fifth of its length cut away at its rear end Intestimony whereof I my signature.

CLAUDIUS DORNIER.

